Power tool performance: research into drill bits (24th May 2007)
Since the launch of HAVTEC, thousands of power tool and appendage combinations have been tested at Loughborough University and the data published on OPERCís website with the permission of manufacturer who support the work.
One continual area of debate relates to the question as to whether there is a significant difference in performance between drill bits supplied by manufacturers and those supplied by alternative drill bit manufacturers?
Some manufacturers would have industry believe that there is a significant difference that that only their own drill bits should be used if the desired levels of productivity and vibration performance are to be obtained. Independent research work conducted to date is however, inconclusive and cannot support this argument. Seminal work conducted on reputable drill bit manufacturers such as Heller, Hilti and Bosch would suggest that provided a drill bit has been manufactured to the PGM criteria, as an example, (the PGM mark determines the minimum level of conformance to a quality standard), then the difference between bits is negligible and inconclusive.
Interestingly, some drill bits that do not conform to the PGM mark criteria do appear to have reduced productivity and/or vibration performance. So when choosing a drill bit, make sure that you only choose a reputable supplier who can guarantee some form of rigorous quality control (for example the PGM mark or other likewise international standard of quality conformance) during the manufacturing process.